Improvement in automatic fans



B. D. THOMPSON. n Improvement in Automatic Fans.

N0. 114,491. P atgnted May 2,1871.

BENJAMIN D. THOMPSON, OF NEW YORK.

Letters Patent No. 114,491, dated May 2, 1871.

IMPROVEMENTlN- AUTOMATIC FANS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.-

Be it known that I, BENJAMIN D. THoMrsoN, of the city, connty, and State of New York, have invented anew and useful Automatic Atmospheric Fan,'of which the following is a specification, reference being bad to the accompanying drawing forming part of the same.

My invention relates to so connecting a fan attached to an adjustable arm with a train of wheels having a coil spring as the motor thereof, that when the wheels are set in motion by the action of the spring the fan will have imparted to it automatically a vibratory motion.

I also arrange a brake or regulator to so act upon a part of the general mechanism comprised in my in.- vention as to govern the velocity of the motion of the fan or to check the motion-altogether.

Figure 1 is a side sectional elevation of box containing the mechanism embodying my invention, with a fan attached.

Figure 2 'is a rear sectional elevation of the same.

A is a main shaft having a spring, B, coiledabout it, with the winding-post at O, and havingrupon it the driving-wheel a, which meshes into and operates the pinion 11 upon a shaft which has upon it the wheel 0, which in turn meshes into and operates the pinion d upon a second shaft having upon it the wheel e, which also in turn meshes into and operates the pinion f upon the shaft. 11' having upon it the wheel g, the whole forming a train of wheels such as composes the mechanism of an ordinary clock-work.

The wheel g again in its turn meshesinto and operates the pinion h upon the crank-shaft b, which is connected with and operates the shaft e by means of the pitman c and the arm cl.

Upon the shaft 0' is fixed the adjustable arm f, which carries and moves the fan D.

F isan eccentric fixed upon the shaft is, which terminates on the front of the box containing the mechanism in the small knob or head E, and by means of which the eccentric is turned and operated. 1

h is a lever, pivoted at g, and joined at It to the b, the pitman c, the arm d, the shaft e, and the ad justable arm f;

It is also evident that therate of motion of the fan can be regulated, or the motion checked altogether, by turning the knob E operating the eccentric F, which will cause the lever h to press more or less upon the shaft on.

It is intended that the fan thus operated shall be convenient and pleasant for use eith er at night or during the daytime of. that season of the year when excessive heat is prevalent and annoying.

By means of the adjustable arm the fan, if placed upon the head of a bedstead, can be operated to create a current of air downward upon the face of the sleeper, thus producing a cooling and pleasant sensation; or if placed upon a table, stand, or other couvenient support, it can be so adjusted as to produce a lateral current of air upon a person sitting beside or near it.

. Claim. What I claim as my invention, and desire to secure by Letters Patent is- The train of wheels specified, operated by the spring B, in connection with the crank-shaft b, the pitmau c, the arm d, the shaft 0', the adjustable arm f can rying and operating the fan D, together with the lever it connected with andoperated by the eccentric F, all constructed, combined, and operating substantially as described and for the purpose specified.

. BENJAMIN D1 THOMPSON. Witnesses:

W21. G. Ream, Gno. Go'rr. 

